Fuse puller



Nov, 30, 1948. A, R, MARLER 2,454,878

FUSE FULLER Filed Aug. 12, 1943 INVENTOR Patented Nov. 30, 1948 FUSE PULLER Albert R. Marler, Forest Park, Ill., assignor to Carl C. Sittler, Chicago, Ill.

Application August 12, 1943, Serial No. 498,270

This invention relates in general to apparatus for inserting and for pulling or extracting electrical fuses, and particularly to means for removing such fuses from or inserting them in a high tension line.

An object of this invention is to provide safe, simple, and eiiicient means for gripping a fuse plug of the cartridge type and holding it securely while inserting it in or removing it from a conventional clamp or fuse holding means in a high tension line.

An important object of the invention is the provision of a new and improved insulated device which can be manipulated readily and quickly by the user to remove or insert a fuse without danger of coming into contact with the voltage in the fuse box, thereby rendering the use of the device safe to the user or operator.

Other objects of this invention include the provision of novel means of dielectric material, with spring means for maintaining the parts in readily operable position, together with means for limiting displacement of the parts, whereby a fuse may be readily gripped, held and manipulated and safely and quickly installed in and removed from a high tension line by the use of one hand, at a desired distance from the person and with a minimum of risk and inconvenience. Additional objects, advantages and capabilities inherent in this invention will become readily apparent from the description thereof which follows.

This invention further resides in the combination, construction and arrangement of parts illustrated in the accompanying drawings, and while there is shown therein the preferred embodiments of the invention, it is to be understood that the same are susceptible of modification and change without departing from the spirit of the invention.

The accompanying drawings illustrate a selected embodiment of the invention and the views therein are as follows:

Fig. 1 is a side elevation of the invention with the Iparts in operative position so as to grip a fuse plug mounted in a spring clamp of conventional type, with the fingers of a workmans hand indicated in dotted lines in gripping position about the hand pieces of the device;

Fig. 2 is a plan View of the device shown in Fig. 1, with the fuse plug and means for mounting the same shown partially in section.

Fig. 3 is an enlarged view of the device shown in Fig. 1 partially in section.

1 Claim. (Cl. 81-3.8)

Fig. 4 is a sectional View along the line 4 4 of Fig. 3;

Fig. 5 is an end elevation of the device shown in Fig. 1 looking to the right; and

Fig. 6 is a side elevation of an alternate form of the invention.

The particular device herein disclosed for the purpose of illustrating the invention comprises a hollow, generally cylindrical body member II having a cut-away portion I2 spaced from one end thereof by an end portion I'3. The cut-away portion I2 is suitably shaped and arranged to receive the body of a fuse of the cartridge type in transverse position, as illustrated in Fig. 1-

A plug Il! is tted within the interior of the end portion I3 and secured therein by means of a pin I5 extending through the plug and the adjacent portions of the walls of the end portion I3. The end portion I3 may be beveled as indicated at IB, or otherwise suitably shaped to facilitate'manipulation of the device about a fuse, as indicated in Figs. 2 and 5. A linger piece Il is rigidly secured to the body member I I adjacent its opposite, open end, as by means of pins I8. A generally cylindrical member or plunger I9 having a diameter slightly less than the internal diameter of the member II is so arranged within the member II as to be freely slidable longitudinally therein. The inner end of the member I9 may be tapered as at 2u in Fig. 2, or otherwise suitably shaped to provide a jaw to cooperate with the inner curved surface 2l of the end portion I3 of the member II for gripping a fuse 22. A palm or hand piece 23 is rigidly mounted on the opposite end of the member I 9 in a manner similar to the mounting of the hand piece I'I upon the body member II. The member I 'I may be Iprovided with linger recesses 24 for convenience in gripping it.

In order to maintain the hand pieces I'I and 23 in convenient alignment and to limit the stroke or movement of the plunger I9, a pin land slot arrangement is provided. This includes a longitudinally extending slot 25 of suitable length in the plunger I9 near the inner end thereof, and a cooperating pin 26 having an end portion adapted to engage said slot, and a threaded portion 21 adapted to be screwed into a threaded opening 28 in a wall of the member II.

Itis desirable that the plunger I9 be normally maintained in retracted or non-gripping position. To this end the member II is provided with an interior portion 29 of enlarged diameter adjacent the hand piece Il. This portion of enlarged diameter is arranged to receive a helical spring 30 circumferentially arranged on the plunger I9.

A collar 3| is xedly mounted on the plunger I9 in spaced relation with the hand piece 23. The outer diameter of this collar is such as to permit it to slide freely within the recess 29 of the member A sleeve 32 having an internal diameter slightly greater than the diameter of the plunger I9 is threaded into the end of the member |I adjacent the hand piece This sleeve is of such length that 'its inner end ,will abut the collar 3| and provide a stop for the plunger I9 so as to limit outward movement of the plunger at a suitable point. The spring 30 is arranged intermediate the collar 3| and the shoulder-32 provided by the cut-away portion 29 of the member I, and normally maintains-the plunger I9 in open or retracted position, as shown in Fig.'3.

The members Il and I9 and thehand pieces IJ and 23 are preferably made of plastic or other dielectric material. The body member and the plunger I9 are generally of a length sufficient to permit the insertion and removal of a fuse at a safe distance from the person of the operator.

The selected form of the device operates inthe following manner. A. fuse -ZlZfbeing mounted in a spring clip 33, andthe plunger I9 being in retracted position, as shown in Fig. 3, vthe operator takes hold of the device by placing one hand about the hand pieces Il and 2,3and positions the cut-away portion vl2 of the member II about the fuse as shown in Fig. 1.` The hand pieces i1 and 23 are then gripped and pulled together to the position and inthe :manner indicatedin Fig. l. When the tapered end 20 of the plunger I9 is tightly pressed against the fuse 22 in cooperation with the inner surface 2|, pull may be exerted on the device to remove the Bfuse from the spring clip 33. Upon release of the grip on the khand pieces and 23, the spring 3|) willfact against the collar V3l to return the plunger lil-tothe position shown in Fig. 3, whereupon the fuseiwill become disassociated from the device.

In an alternative form of the device shownin Fig. 6, the members i1 and `23 are providedinfthe form of ,a nger piece orptriggermember 34 and a palm or handle 35 of pistolstyle.

Changes maybe made inthe form, construetion and arrangement of the vparts without de parting from the spirit ofthe invention or sacrificing any of its advantages, and `the right is hereby reserved to make all such changes as 4 fairly fall within the scope of the following claim.

The invention is hereby claimed as follows:

A fuse puller formed of insulated material for pulling elongated cartridge fuses from the electric contact elements with which the fuses norm-ally are associated comprising a tubular body portion terminating at one end in a hook-shaped member, a lfuse seaton the hook-shaped member, a stem movable longitudinally in said tubular body, a transversely curved end forming a fuse seat at 'the end of the stem lying opposite to the seat on `the:hook-shaped member and in position to cooperate with the seat on the hook-shaped mem'- berin engaging and holding a fuse on said rst named seat, a pin extending radially inwardly on said tubular body portion, an elongated slot in said stem adapted to receive and cooperate with said pin to thereby prevent rotation of said stem and maintain the fuse seats on said stem and hook-shaped. member in proper relation to snugly engage `.the opposing sides of the curved portion oi a fuse, means normally maintaining said stem in position to urge the stem in a predetermined direction whereby the seat on the stem is normallypositioned away from the seat on the hookshaped member, a handle member on the stem, a handle member` on the body whereby the Seaton the stem is moved toward holding position with respect to the other seat when an urging action toward each' other is applied to the two handles.

ALBERT R. MARLER.

REFERENCES CITED The following references are oi record in the file oi this patent:

UNITED STATES PATENTS Number Name Date 172,520 Sullings J an. 18, 1876 400,273 Valiquet Mar. 26, 1889 1,181,654 Eifel May 2, 1916 1,232,488 Brooks July 10, 1917 1,363,515 Knoss Dec. 28,1920 1,633,237 Whillow June 21, 1927 I1,724,435 'Studwell Aug. 13, 1929 1,927,528 Nilsson Sept. 19, 1933 v2,082,669 Voigt June 1, 1937 2,243,305 Adler May 27, 1941 

